import random 
#x=[]
#for i in range(10):
#    x.append(chr(random.randint(97,122)))
#suffixstr="".join(x)
for i in range(100):
    suffixstr="".join([ chr(random.randint(97,122)) for i in range(10) ])
    print("{:06.0f}".format(i)+"."+ suffixstr )


# 完成的不错，不过，序号，一般是从1开始
